Power amplifier



FIG. 1 is a perspective view of the power amplifier.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a right side elevation view thereof, the opposing left side of the power amplifier being a mirror image thereof.

The broken lines in the drawings depict subject matter that is hereby disclaimed and forms no part of the claimed design. The undisclosed bottom view of the power amplifier forms no part of the claimed design. 

CLAIM The ornamental design for a power amplifier, as shown and described. 